ACE Weekly 02/06/04 - 02/12/04 All ACE spacecraft subsystems are performing nominally. A attitude maneuver was successfully executed on 02/06/04. The next attitude maneuver is scheduled to occur on 02/16/04. ============================================================================ Orbit Events: Per Craig Roberts (FDF): The next ACE transit begins February 22 and ends March 15 (a span of 22.49 days). This one will involve the closest angular approach to the Sun yet seen, i.e., 0.63 degree (deg) from solar center. (By comparison, the solar angular radius as seen from Earth at that epoch will be approx. 0.27 deg). The updated details and epochs (UTC) follow: 22 Feb 05:22 4.75 deg inbound 28 Feb 15:51 2.0 deg inbound 1 Mar 17:19 1.19 deg inbound 3 Mar 21:57 0.63 deg closest approach 6 Mar 13:40 1.19 deg outbound 8 Mar 17:55 2.0 deg outbound 15 Mar 16:14 4.75 deg outbound The 1.19 deg reference was included because that was the closest approach during the December transit. ACE will spend 4.85 days within the 1.19 deg zone. ===================================================================== OCRs Executed: None. ===================================================================== Ongoing Activities: TAPS: - Release 4.2 was delivered on 02/12/04 and is currently being tested by the FOT. This release should contain the functionality required to transition from GTAS to TAPS. The next release 4.2.1 is scheduled for 03/03/04. - FOT has submitted comments to TAPS System User's Guide. ---------------------------------------------------------------------------- Automation (ROBOTT): - Release 0.4 (HSM & OFFLINE) is operational on String 1. The Command & Control component was not delivered because it was not ready for operational use. - Offline: 2 DRs have been fixed on String 3; one has been verified and the other is still under test by the FOT. - HSM: 2 DRs have been fixed on String 3; one has been verified and the other is still under test by the FOT. - Command & Control: All 6 DRs for C&C have been fixed on String 3 and are currently being tested by the FOT with no issues reported to date. - RTMON: Minor issues are being found but they're being resolved as soon as they are uncovered. Testing of the failover monitor is to occur this week. ============================================================================ Extra Spacecraft Activities: DOY 04038 (02/07/2004) - Ran the procedure, S_TLM_SECTIONS for SSR-B, SBE_CT=286 and SCRUB_ERR_CT=0. DOY 04039 (02/08/2004) - Ran the procedure, S_TLM_SECTIONS for SSR-A, SBE_CT=270 and SCRUB_ERR_CT=12. ===================================================================== Anomalies: None this reporting period. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Glen A. Miller ACE Flight Operations Observatory Engineer Honeywell Technology Solutions Inc. Goddard Space Flight Center Building 14, Room W10A Mail Stop 428.2 Greenbelt, MD 20771 Office: 301-286-7071 Pager: 800-425-3174 Fax: 301-286-1729 Email: gamiller@pop500.gsfc.nasa.gov ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~